EXAMPLE 12.8

Reading software output, continued. Additional output generated by SPSS for the ANOVA of the Facebook friends example is given in Figure 12.8. We will discuss the construction of this output later. For now, we observe that the results of our significance test are given in the last two columns of the output. The null hypothesis that the five population means are the same is tested by the statistic F = 4.142, and the associated P-value is reported as P = 0.003. The data provide clear evidence to support the claim that there are some differences among the five profile population means.